Bob Greenblatt’s first post-NBC job will be a massive undertaking: the Peacock’s former entertainment chairman has now been tapped to serve as chairman of WarnerMedia Entertainment and direct-to-consumer. In his new role, Greenblatt will oversee TV operations across the company, from properties including HBO, TNT, and TBS to TruTV and its soon-to-debut streaming service. Greenblatt will report to WarnerMedia C.E.O. John Stankey, and his direct reports will include former NBC Entertainment president Kevin Reilly, who last winter was named content chief for the streaming platform. But reports differ as to what influence, if any, Greenblatt’s anticipated appointment to his new job had on Richard Plepler and David Levy’s decisions to leave their respective roles last week.

Last week, nearly nine months after AT&T successfully acquired Time Warner, Plepler—who during his almost three-decade tenure as HBO’s C.E.O. crafted one of the most influential premium-television slates to date, with series including The Sopranos, Sex and the City, The Wire, Game of Thrones, and Girls—announced that he would be leaving the company. There had long been discussion regarding whether Plepler’s careful, selective programming approach would prove compatible with AT&T’s desire to ramp up output, and sources told The Hollywood Reporter that the exec was mainly concerned about impending reductions in HBO’s autonomy within the larger WarnerMedia ecosystem. One day later, Levy announced his own exit. According to Variety’sCynthia Littleton, however, Greenblatt’s appointment spurred both resignations. A source told V.F. that Plepler made his decision to leave after he saw his role and autonomy changing; the rumors of Greenblatt’s appointment, the source said, simply surfaced before he could make the official announcement. (Representatives for HBO and WarnerMedia did not immediately respond to V.F.’s requests for comment from Plepler and Levy.)

Either way, Greenblatt’s new position will be a crucial one in the months to come—although if anyone’s résumé could have prepared them for the task, it’s Greenblatt’s. In addition to heading up entertainment programming for NBC from 2011 until his abrupt resignation in 2018, Greenblatt also played a pivotal role in establishing Showtime’s credentials as an original programmer in its own right, Variety notes.

“I’m honored to be joining WarnerMedia during such an exciting time for the company and the industry as a whole, and I look forward to working alongside the many talented executives and team members across the company,” Greenblatt said in a statement. “WarnerMedia is home to some of the world’s most innovative, creative, and successful brands and we’re in a unique position to foster even deeper connections with consumers. And it goes without saying I will always have a soft spot in my heart for HBO going back to the rewarding experience I had producing Alan Ball’sSix Feet Under.”

Meanwhile, other executives are expanding their influence in the wake of these shifting tides: CNN chief Jeff Zucker will now occupy a newly created role as WarnerMedia’s chairman of news and sports—a domain that will include Turner Sports, Bleacher Report, and AT&T’s regional sports networks in addition to CNN Worldwide, Variety reports. (Zucker, it’s worth noting, was also once in charge of NBC Entertainment, from 2000 to 2004; he directly preceded Reilly’s tenure from 2004 to 2007.) Gerhard Zeiler will serve as chief revenue officer, and Warner Bros. C.E.O. Kevin Tsujihara will see his own influence expand as well, per Variety. With so many moving parts and a lot of consolidation anticipated on the horizon, plenty of change remains ahead—so we’re guessing no one has settled in too comfortably just yet.